normal align=center>温石棉纤维长度分级标准及纤维组成
normal align=center>等级或
normal align=center>级别
normal align=center>平均纤维长度不小于mm
normal align=center>平均纤维含量%
normal align=center>干式分级%
normal align=center>含砂量不大于%
normal align=center>夹杂物含量 %
normal align=center>不大于
normal align=center>不小于
normal align=center>不大于
normal align=center>+12.5mm
normal align=center>+4.75mm
normal align=center>+1.4mm
normal align=center>满底
normal align=center>手选1级
normal align=center>19
normal align=center>60
normal align=center>
normal align=center>
normal align=center>
normal align=center>
normal align=center>5.0
normal align=center>
normal align=center>手选2级
normal align=center>9
normal align=center>60
normal align=center>
normal align=center>
normal align=center>
normal align=center>
normal align=center>10.0
normal align=center>
normal align=center>机选3级
normal align=center>
normal align=center>
normal align=center>12~65
normal align=center>24~55
normal align=center>8~25
normal align=center>3~8
normal align=center>0
normal align=center>0.04
normal align=center>机选4级
normal align=center>
normal align=center>
normal align=center>0
normal align=center>10~60
normal align=center>30~70
normal align=center>10~20
normal align=center>0.3
normal align=center>0.04
normal align=center>机选5级
normal align=center>
normal align=center>
normal align=center>0
normal align=center>0
normal align=center>50~80
normal align=center>20~50
normal align=center>0.5
normal align=center>0.02
normal align=center>机选6级
normal align=center>
normal align=center>
normal align=center>0
normal align=center>0
normal align=center>20~40
normal align=center>60~80
normal align=center>1.0
normal align=center>0.02
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